Materials and Construction

A. 1 to 15
B. 1 to 8
C. 1 to10
D. 0 to 10

A. Cork
B. Glass
C. Graphite
D. Rubber

A. Aqua regia
B. Ferrous sulphate
C. Hydrochloric acid (10%)
D. None of these

A. 0.1 to 0.35
B. 0.35 to 0.5
C. 0.8 to 1.4
D. 1 to 1. 5

A. Normalising
B. Tempering
C. Annealing
D. None of these

A. Ammonia
B. Acetic acid
C. Phenol
D. Formaldehyde

A. Do not require heat treatment for any of its applications
B. Are used for leaf and coiled springs
C. Do not have good resilience properties
D. Is tempered at 850°C

A. Wood
B. Concrete
C. Copper bearing steel
D. Porcelain

A. Is the hardest metal in common use
B. Is the lightest metal in common use
C. Cannot be scratched by finger nails
D. Cannot be work hardened

A. Silicone rubber, teflon, porcelain and wood
B. Nickel, monel, stainless steel and graphite
C. Aluminium, copper, high silicon iron
D. Brass, cast iron, mild steel and tin